Fiberising Spinner Temperature Control Using Curvature-Based Reference Points
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Solution Overview
Problem
Existing methods for regulating the temperature of fiber-forming centrifuges are inaccurate due to wear and vibrations, leading to incorrect reference points for control, which affects the quality and longevity of the produced fibers.
Innovation Solution
A method using the second derivative of the temperature curve as a function of the angular position of a temperature measuring device to identify specific points on the fiber bed, independent of dimensional changes caused by wear or vibrations, and employing two control loops to regulate temperature at these points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature regulation is performed using vertical coordinates of key points on the fiber bed, then temperature control can be implemented, but the regulation becomes inaccurate over time due to wear and vibrations causing coordinate changes
Solution Approach 1:
The patent replaces the mechanical/physical coordinate-based identification method with a mathematical approach using the second derivative of the temperature curve. Instead of relying on vertical coordinates that change with wear and vibrations, the system calculates specific points based on the curvature of the temperature profile, which remains invariant under dimensional changes. This substitution of the identification method resolves the contradiction by maintaining measurement precision despite wear and vibrations.
Solution Approach 2:
The patent changes the parameter used for identifying key points from vertical coordinates to the second derivative of temperature with respect to angular position. By transforming the identification criterion from a spatial coordinate-based approach to a mathematical property (curvature) of the temperature profile, the system achieves invariant point identification regardless of wear or vibrations, thereby maintaining both measurement precision and regulation reliability.
2Productivity
If the centrifuge operates at high rotational speed to produce fibers, then fiber production is achieved, but the centrifuge deteriorates due to high mechanical, thermal, and chemical stresses
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the temperature profile of the fiber bed and adjusts operational parameters to maintain optimal temperature conditions. By using the second derivative method to identify key points and regulating temperature at these invariant locations, the system enables sustained high-speed operation while preventing thermal deterioration, thus extending centrifuge lifespan without sacrificing productivity.
3Manufacturing precision
If temperature control is monitored at multiple points along the fiber bed, then temperature profile regulation is improved, but the complexity of the control system increases
Solution Approach 1:
The patent replaces complex mechanical coordinate tracking systems with a mathematical processing approach. Instead of using multiple sensors and mechanical adjustment mechanisms to track changing positions, the system uses computational methods (calculating the second derivative of the temperature curve) to identify control points. This substitution reduces mechanical complexity while maintaining or improving temperature profile control accuracy through more reliable mathematical identification of key points.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures precise temperature regulation, independent of wear and vibrations, maintaining fiber quality and extending the lifespan of the centrifuge.
Implementation Method 1
temperature measurements of the fiber bed are performed using a temperature measuring device (40)
Implementation Method 2
This sensor is a pyrometer, at least part of which is pivotally mounted and sweeps an angle intercepting the vertical axis of symmetry of the fiber-laying device
Implementation Method 3
Under the action of centrifugal force, the glass is propelled through these perforations in the form of filaments
Implementation Method 4
a high-temperature, high-speed gas stream, emitted tangentially to the perforated wall of the centrifuge's peripheral belt, may also be used for stretching
Data Source
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AI summary
The present invention concerns a method for determining specific points of a rotary fiberising spinner (10) used in a fibre drawing device (1), said method comprising the following steps: - Taking temperature measurements of the fiberising spinner obtained by means of a temperature measurement device (40) suitable for taking temperature measurements of the spinner according to several angular positions of said measurement device in order to provide data to at least one calculation unit (30, 45) that constructs a curve representative of the temperature depending on the angular position of a temperature measurement device; - Processing said measurements by calculating the second derivative of the temperature curve depending on the angular position, by a calculation unit (30); - Seeking at least one specific point for which the second derivative meets a predefined condition.